Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김진웅 | - |
dc.date.accessioned | 2018-03-06T07:04:07Z | - |
dc.date.available | 2018-03-06T07:04:07Z | - |
dc.date.issued | 2012-11 | - |
dc.identifier.citation | Journal of Colloid And Interface Science,2012, 386(1), P.135-140 | en_US |
dc.identifier.issn | 0021-9797 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0021979712007734?via%3Dihub | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11754/42947 | - |
dc.description.abstract | Titania nanoparticles were modified by free-radical graft polymerization of 2-methacryloyloxyethyl phosphorylcholine (MPC) at the particle surface, resulting in the formation of a 1-2 nm thick polymer brush. The zwitterionic nature of the polymer layer suggests that the suspension stability is a delicate function of pH, as well as volume fraction, salt concentration and the presence of charged or un-charged additives which may act as depletants or to screen charge interactions in the system. In this context, we characterized the suspension rheology as a function of volume fraction, pH, ionic strength and the concentration of surfactants in the suspension. Near-neutral pH, the brush layer is effective in stabilizing particles against aggregation with Newtonian behavior observed for volume fractions approaching 14%. Flocculation of particles and an onset of shear-thinning behavior was observed on decreasing pH from near-neutral. Conversely, suspension stability was maintained on increasing pH from near-neutral. Likewise, flocculation could be quickly induced by the addition of salt and cationic surfactant in small amounts, but the suspensions displayed greater stability to anionic and non-ionic surfactant additives. These results have important implications for the successful formulation of complex fluids employing zwitterionic colloids. (c) 2012 Elsevier Inc. All rights reserved. | en_US |
dc.description.sponsorship | Z.S. and C.O. acknowledge partial support from NSF under CBET-0828905 and CBET-1066904. Facilities use was supported by YINQE and NSF MRSEC DMR-1119826. | en_US |
dc.language.iso | en | en_US |
dc.publisher | ACADEMIC PRESS INC ELSEVIER SCIENCE | en_US |
dc.subject | Colloidal gel | en_US |
dc.subject | Colloidal suspensions | en_US |
dc.subject | Rheology | en_US |
dc.subject | Titania | en_US |
dc.title | Synthesis and suspension rheology of titania nanoparticles grafted with zwitterionic polymer brushes | en_US |
dc.type | Article | en_US |
dc.relation.volume | 386 | - |
dc.identifier.doi | 10.1016/j.jcis.2012.06.085 | - |
dc.relation.page | 135-140 | - |
dc.relation.journal | JOURNAL OF COLLOID AND INTERFACE SCIENCE | - |
dc.contributor.googleauthor | Shao, Zhen | - |
dc.contributor.googleauthor | Yang, Young-Jun | - |
dc.contributor.googleauthor | Lee, Hyun-Suk | - |
dc.contributor.googleauthor | Kim, Jin-Woong | - |
dc.contributor.googleauthor | Osuji, Chinedum O. | - |
dc.relation.code | 2012204870 | - |
dc.sector.campus | S | - |
dc.sector.daehak | GRADUATE SCHOOL[S] | - |
dc.sector.department | DEPARTMENT OF BIONANOTECHNOLOGY | - |
dc.identifier.pid | kjwoong | - |
dc.identifier.researcherID | 56579031700 | - |
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